I saw it in a 82 ad.
could be earlier ,nevertheless the production span was quite long,cause there do exist three(!) different types,with speaker and reception variations .
G'day from Australia.
I found this Sanyo c12 mkII in a junk collection today and was interested in some general information. Despite being rained on, a power plug which only works on certain angles and a broken antenna its a go'er.
Welcome! And the C12 is a nice unit. And I love Australia as I bought my Pioneer CK-5F from there and had it shippd here.